The engineer’s reference desk
361–384 / 1,044 sources
ASHRAE 2019
Warn when high inlet temperatures (driving fan speed-up) are combined with HDD-heavy storage racks.
Danfoss 2024
In the power-quality check compute THDv at the PCC for every supply mode (both transformers, one transformer, generator only); generator mode is usually the worst case.
TMMOB Makina Mühendisleri Odası (MMO) - Tesisat Mühendisliği Dergisi 2025
Provide a cooling-topology picker (room, row, rack, economiser direct/indirect) with Turkish labels.
Open Compute Project Foundation 2025
Site and compliance rules should hold jurisdiction-specific targets (for example Germany: PUE 1.2 for new builds and 10-20% ERF).
Uptime Institute Intelligence 2023
For EU sites of 1 MW and above, trigger the EED waste-heat assessment as a step in the design process.
iMasons Climate Accord (Infrastructure Masons) 2025
Include generator auxiliary loads (block heaters, battery chargers) in the parasitic load and PUE calculations.
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ASHRAE 2008
Use it as the source of reference layouts for high-density air-cooling templates.
U.S. DOE Federal Energy Management Program / Oak Ridge National Laboratory 2010
Place metering points in single-line and chilled-water diagrams according to the site, building, system and end-use levels.
Schneider Electric 2011
Offer a 'North America 415/240 V' one-line template (480 V UPS, auto-transformer RPP/PDUs, isolation transformer on UPS bypass) next to the traditional 480 to 208/120 V.
National Laboratory of the Rockies (formerly NREL) 2026
Model heat rejection as a priority chain (reuse, dry cooler, evaporative tower) with hourly switching.
National Laboratory of the Rockies (formerly NREL) 2026
In the heat-reuse module, support on-site end uses (low-temperature terminals, snow melt).
National Laboratory of the Rockies (formerly NREL) 2026
Use as a reference case for warm-water DLC presets (supply about 24 C, return about 38 C).
Open Compute Project Foundation 2025
In CDU catalogue entries, distinguish single-phase and two-phase (refrigerant type, saturation temperature, facility-water supply temperature).
Energies (MDPI AG) 2020
In selling data-centre waste heat, set heat-pump COP by cooling type (all-liquid 6.3, mixed 5.5, air-cooled 4.1) and include electricity price sensitivity in the feasibility study.
arXiv preprint (Texas A&M University) 2026
In power-chain loss calculators for AI halls, do not evaluate PSU, UPS and transformer efficiency only at average load; accept a load-profile descriptor (duty cycle, high/low power, frequency).
Vertiv 2024
Add a TEWI calculation to cooling options (refrigerant GWP, charge kg, leak rate, life years, grid emission factor).
Danfoss 2024
In the liquid-cooling catalogue store coupling size, OCP compliance, maximum working pressure, flow coefficient/pressure drop, disconnect-under-pressure limit and wetted materials.
Schneider Electric 2020
Add an on-site energy/DER layer: sources utility, diesel_standby, gas_chp, cchp_absorption, pv, wind, fuel_cell, bess with a continuous vs standby flag.
Schneider Electric 2023
Add tenantId and commercialStatus (open, closed, reserved, internal) to racks, cages and floor zones, with a floor-plan overlay coloured by status and per-zone remaining power, cooling and ports.
Schneider Electric 2026
Give every asset type, serial, rack/U location, network port, explicit A/B power path (rack PDU, UPS, PDU, switchgear) and cooling-unit dependency so the design exports as a DCIM digital twin.
Schneider Electric 2022
Add expected-life defaults to the asset catalogue (LV switchgear 15-25, MV switchgear 30-40, UPS 10-15 years), insulation medium for MV gear (SF6 or SF6-free), refrigerant with GWP for cooling units, and links to PEP/EPD documents.
Schneider Electric 2011
Give edge and closet room templates a default monitoring package: door switch, temperature at 3 heights, leak detector, camera, network management card on UPS and cooling, and metered/switched PDUs with sequencing.
Schneider Electric 2020
Add rack catalog fields: form, width, depth, height in U, static and dynamic load, UL 2416 and ISTA 3E flags, door perforation.
Consulting-Specifying Engineer 2021
Offer integrated-free-cooling chillers as a catalogue option with the free-cooling changeover ambient field.
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